PTFE compression union needle valves with shutoff function for laboratory use. Key benefits - Precise flow control and reliable shutoff: needle valve design allows fine adjustment and quick isolation in lab lines. - Chemical compatibility and clean connections: PTFE construction suits aggressive chemicals and connects via compression unions for leak-free service. - Wide size availability: suitable for a range of lab setups from small-bore to larger lines. Size options - Available in multiple sizes including 1/8", 1/4", 3/8", 1/2", 3/4", 1", 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 25 mm, and also 6.35 mm (1/4 inch). Applications - Chemical transfer lines and sampling feeds in analytical laboratories (eg, chromatography solvent lines). - Filtration, reactor, or transfer setups that require controlled flow and reliable shutoff. - Systems using PTFE tubing with compression unions where precise isolation is needed. Performance and compatibility - Functions as a shutoff valve with precise flow control for laboratory installations. - Compatible with standard PTFE compression unions and lab piping to ensure secure, leak-free connections.